Heating-furnace



(No Model.) 4 Sheets-Sheet 2.

E. W. ANTHONY.

HEATING FURNACE.

' PatentedApr. 10,1888.

WITNESSEE.

(No Model.) 4 Sheets-Sheet 3. r

E. W. ANTHONY. 'H-EATING FURNACE.

No. 380,711. Patented Apr. 10, 1888..

Wrrplasszs. I INVENTEIFK (No Model.) 4 Sheets-Sheet 4.

E. W. ANTHONY HEATING FURNACE.

No; 380,711. Patented Apr; 10, 1888.,

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UNITED STATES PATENT @rrica.

EDGAR W. ANTHONY, OF BROOKLINE, MASSACHUSETTS.

HEATING-FURNACE.

PECIFICATION forming part of Letters Patent No. 380,711, dated April 10, 1888.

Application filed April 14, 1887.

'50 all whom it may concern:

Be it known that I, EDGAR W. ANTHONY, of Brookline, in the county of Norfolk and State of Massachusetts, a citizen of the United States, have invented a new and useful Im provement in Heating-Furnaces, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification,in explaining its nature, in which- Figure 1 is a view in perspective of a furnace containing the invention, portions of the casing and radiator being removed to illustrate the construction. Fig. 2 is a plan view of the outer radiator. Fig. 3 is a horizontal section on the line mm of Fig. 1. Fig. 4 is a view in horizontal section upon theline y yof Fig. l, and in plan of the parts below said line. Fig. 5 is a view in horizontal section upon the linezz of Fig. 1, also showing in plan the parts below said line. Figs. 6, 7, 8, and 9 are views in perspective of the parts composing the inner radiator. Fig. 10 is a view in plan of a plate surrounding the the pot.

Referring to the drawings, Ais the combustion-chamber, formed or inclosed by the outer radiator casing or shell, a.

C is the outer casing or shell of the furnace. c is the outer air-heating chamber. The outer radiator casing or shell, a, preferably is made of sheet metal and is cylindrical in form, and its lower edge enters the horizontal cup or recess a in the cast-metal annular plate a (see Figs. 1 and 10,) which rests upon the upper edge of the fire-pot a and extends horizontally outwardly therefrom. The top of the outer radiator casing or shell, a, preferably is formed by a downward inward-extending plate, a, which has a vertical flange or lower edge, a which shuts into thehorizontal cylindrical cup or recess a (see Fig. 6) in the upper part of the shell of the inner radiator, D. The inner radiator is contained in the combustionchamher, and is surrounded by the shell or casing a, excepting a small section of its top. It

comprises a lower spider or section,d, (see Fig. 9,) having three tubes or pipes, (1, each of which extends downward to and enters the cup'or recess A about the opening A (see Fig. 10) in the annular plate a, and is con- Serial No. 234,906. (No model.)

nected with the air-heating chambcrc, so as to receive air therefrom through the opening at at the lowerend of the extension (1. (See Fig. 1.) These pipes or tubes are curved inwardly from the annular plate a toward each other, and they are united at their upper ends by the annular connecting-sections (1*, in which are formed the circular cups or recesses (1*. (See Fig. 9.) This upper section, d of the inner radiator has the conical deflectingsurface cl, the inner section, d of the combustion chamber, and the air-heating chamber (1, (see Fig. 1.) into which the passage in the tubes or pipes (2 enter, and from which passages (1 in the pipes or tubes (i projecting from this part of the radiator, extend upward to the upper part of the air-heating chamber 0. This section d preferably is made in three parts or castings, D D D (See Figs. 1, 6, 7. and 8.) First, the outer conical section, D, which has the vertical lower edge, d, to tit the outer cup or recess. (1, in the spider d,- second, the inner part, D, which has the conical-section d flhav ing a straight lower edge, e, which enters the inner cup or recess, (2*, of the spider, and the outwardly-curved upper section, d, which has a circular edge. at, which enters the circular cup or recess d in the top edge of the part D, and which, with the part D, forms the airheating chamber d. This piece D also has the oval cups (2 about the openings cl", for receiving the lower ends of the downward-extending tubes or pipes d, which extend from the third part, D", of the upper division ofthe radiator. This third part or piece, D, is cylindrical in shape, has the cylindrical cup to, for receiving the vertical flange a of the plate a, as above explained, and the central collar, d, about the hole d centrally arranged to receive the end of the smoke-pipe and the downward-extending tubes or pipes d. This upper section,d of the radiator also has a central hole, which, preferably, is stopped by a plug, d, and through which dust and soot may be removed from the central chamber.

It will be seen that the products of combustion pass from the lower part of the combustion-chamber, or that part within the tubes or pipes d, outwardly past them, through the spaces between them, and then upward along the outer wall, d of the upper section of the inner radiator and the inner wall of the casing a of the outer radiator, and then inward over the top d of the upper section of the radiator, and between the vertical tubes at into the inner chamber, d of the upper section of the inner radiator, and then to the smoke-pipe D.

It will also be seen that the smoke-pipe is arranged centrally in relation to the inner radiator and to the combustion-chamber, and so as to draw uniformly from all sides of the combustion-chamber, causing the heat to be uniformly distributed in the combustion-chamber and all sections of the outer and inner radiator to be substantially uniformly heated. This causes two desirable results: first, the air in passing through the heatingchamber over the radiating-surfaces is evenly heated, and, second, the parts of the radiator wear longer, because there is less liability of their cracking or rupturing.

I am aware that inventions have previously been made with inner radiators; but what I aim to accomplish is to overcome the defects which have generally existed in constructions ofthis kind-namely, leaky and diflicultj oints to make gas-tight and liability to crack from unequal or uneven expansion.

It will be seen that in the construction herein described all the joints are horizontal cup or sand joints, and are virtuallyself-packing. radiator is such as to give the greatest strength and to enable it to best resist the effects of a continuous hot fire; and its shape is such that the products of combustion are thrown to the outside of the combustion-chamber, thus intensely heating the outer radiator before they can pass into the smoke-outlet; also, that the outlet being situated at the center of the fire compels the products of combustion to pass outside near the outer dome or radiator before entering it, thereby distributing theheatevenly throughout all parts of the. radiator, no one portion becoming more heated than another.

Another important feature of the construction is that the furnace is practically self-cleaning. All the soot that gathers within the inner radiator is quickly and easily removed by lifting the plug (2. (Shown in Figs. 1 and 7.) Another important featurein the construction is obtained by making the size of the chamber d of the inner radiator considerably larger than the holes of the tubes or pipes d forming the spider, thus permitting the intenselyheated air to expand as it leaves the passages of the spider, and as the outlets from this inner chamber to the air-heating chamber are also larger than the inlets to the chamber it follows that the air must be drawn with great rapidity through the inner radiator.

It will be seen that by inclining downward the top plate of the outer radiator a chamber or space, E, is formed, which permits the join- The form of construction of the inner ing of the smoke-escape pipe to the collar d at a lower level than would otherwise be the case, and also permits the use of a suitable length of vertical pipe to be used before the change to a horizontal direction becomes necessary. This construction is necessary for a uniform draft from all parts of the combustion-chamber. The inclined inner surface of the top plate also serves to direct the products of combustion from the upper part of the chamber to the passages to the chamber d The area of radiating-surface is also increased.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United States 1. In a heating stove or furnace, the combination of the fire-pot, the outer radiator shell or easing, a, the plate a extending outwardly from the fire-pot wall, the tubes or pipes d, having inlets without the said plate and bent or curved inward, as specified, the inner radiator, D, having the chamber d into which the passages of said tubes or pipes enter, and having the inclined surface at, the tubes or pipes d", extending upwardly therefrom and having passages opening into the upper part of the air-heating chamber 0, the said air-heating chamber 0, and the casing O, the chamber d, connected with the combustion-chamber, as specified, and the smoke-escape outlet (1 substantially as described.

2. The combination, in a heating stove or furnace, of the fire-pot 0. the annular plate a, extending outward from the edge thereof and having the cup or recess a in its upper edge, and the holes A, each of which is surrounded by the cup or recess A,'the tubes or pipes d, the upper ends of which are connected and have the inner and outer recesses or cups, (2*, the radiator comprising the section d having the edge e, which fits the inner cup or recess, d, and has the edge d, which fits the cup or recess d of the part at of the radiator, the said part (2 having the cup or recess d about its upper edge, and the edge d, which fits the outer recess, d", and which sections together form the chamber (1", the openings (P from said radiator, and the cups or recesses (1 of the said openings, and the upper plate, D having the cup or recess a, and the central opening, d provided with a pipe or collar, d, and pipes or tubes (2, extending downward from the said plate D the lower ends of which enter said recesses or cups d, and the casing or shell a, the lower end of which extends into said cup (1 in the annular plate 11 and which has an annular top plate, a", the edge of which extends into the upper cup, a, as and for the purposes specified.

EDGAR \V. ANTHONY.

In presence of RAYMOND, 2d, FRED. B. DOLAN. 

